Gas-oven attachment.



W. A. E. VALENTINE.

GAS OVEN ATTACHMENT.

APPLICATION FILED MAR. 2I, I9I8.

Patented Jan. 7, I919.

llIlI/E/VTOR arrive wow/0m i EI A TTOR/VEYJ WILLIAM A. E. VALENTINE, oram YORK, N. Y.

GAS-OVEN ATTACHMENT.

Specification of Letters Patent.

Patented Jan. 7. 1919.

Application filed March 21, 1918. Serial No. 223,767.

To all whom it may concern.

Be it known that I, WILLIAM A. E. VAL- ENTINE, a citizen of the UnitedStates, residing at. New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in Gas OvenAttachments; and I do hereby declare the followingto be a full,clear,,and exact description of the invention, such as will en- Furtherobjects will be apparent from the following specification, appendedclaims and drawing in which Figure 1 is a front elevation of the deviceas applied to a gas oven,

Fig. 2 is a vertical sectional view there through, p,

Fig. 3 is a horizontal sectional view as on the line 33 of Fig. 1',

Fig. 4is a similar view through a slightly altered form,

Fig. 5 is a vertical. sectional view as on the line 55 of Fig. 1, v

Fig. 6 is a perspective view of a detachable frame and screen for use inthe device shown in Fig. 4,

Fig. 7 is a perspective view showing a slight modification, and

Fig. 8 is a similar view of an additional form. r

In the common use of a gas oven, the heated air currents which are usedfor baking are allowed to circulate freely through the oven and outthrough the outlet flue, and when a circulation is established, thevelocity of these heated air currents increases to more rapidly directcold air currents against the heating agents from whence the heated aircurrents rise to partiall serve their purpose, and then before the f lheating effect has been obtained, this heated air current is permittedto pass from the oven. This free flow of the air current through the gasoven furthermore causes the light and floating particles of grease orsoot to be conveyed from the interior of the oven to the atmosphere inthe room. These floating 'partlcles 111 time collect upon the walls orcell-ing to mar the appearam-e thereof.

In this device. provision is made to retard thefree flow of air currentsfrom the in,- teriorof the oven to thereby utilize all of the heatunits, and also. to filter the air P21S ing from the interior of theoven so that none of the floating particles are emitted. butarecollected upon a washable, non-oxi dizable screen.

Referring more specifically to the drawings 10 indicates a gas ovenprovided with the usual door 11 and upon the top of this oven; the usualflue flange 12 is placed. This flange supports a short section of pipe13 which is closed at its upper end as by a cap 14 his pipe is providedwith a transverse flange 15 which extends part way across the interiorof the pipe to reduce the opening thereof at that portion to one half ofthe normal area of the pipe, and this flange also serves as a supportfor the lower end of a screen 16 which is slidably mounted inthe upperend of this short pipe section. FlaHQ'PS 17 secured in this pipe extendvertically and serve to maintain the screen 16 in fixed and contactingposition to prevent the free passage of air currents about the marginthereof. This screen comprises a metallic frame to which a ply ofasbestos fabric of loose weave is attached. Instead of usin a metallicframe, it is possible to use on y a sheet of asbestos fabric of a porousnature, because no strain is exerted upon this screen; This screenseparates the upper end of the short tube section 13 into two passages,the rear one of which forms a continuation of the flue from the interiorof the oven. and through this rear passage the heated air cur rentsmustpass to the rear face of the Screen.

Upon the approach of these heated air currents to the screen, portionsthereof pass freely through the screen into the chamber between thisscreen and the front wall of the tube. Outlets for this volume ofcollected filtered air are formed by the perforations 18 in the frontwall above the base or flange 15.

A damper 19 is also pivotally mounted within the tube 13 and this damperis provided with the operatin handle 20 which extends outside of the. tne 13.

. It is apparent that as the heated air curper 19 may be swung tofurther retard the flow of the air current through the oven.

In Fig. 4t of the drawing, the'opposite sides of the flue section 21 arecrimped as at 22 to form guides for a screen 23 which may have the'loweredge of the frame offset as at 24: to direct the heated air current upbehind the screen. This device will be used in connection with the usualdamper formation as above described, and suggests only one of numerousforms which may be used for mounting the screen.

Fig. 7 shows two heads 25 and26 formed of porous or foraminous materialwhich comprise plies of fireproof material attached to the frames 27 and28 which are held in spaced relation by rods 29. This type fits into acircular or elliptical stove pipe which has its remote end open. Theframes 27 and 28 are of course shaped to fit in pipe sections and may beheld in place by frictional contact.

In Fig. 8, a wire frame 30 is provided with a screening fabric 31 whichis secured to this frame in any desired manner. The lower offset endofthe frame 32is also covered by an extension 33 of the screening fabricto direct the heated air currents up behind the screen. A. cap similarto that shown in Fig. 1 is placed on the pipe sec tion 3% to close theupper end of the unfiltered air current flue.

It is thought that the application and use of this device is clear inview of the foregoing, and that further description thereof isunnecessary and it is also evident that with the use of this device, agreat saving in fuel may be hadbecause of the fact that the volume ofair within the oven may be retained at a more constant temperature andin its slow passage through the oven, less heat is required to raise thetemperature of this volume of air to the desired degree. It .is alsopossible to obtain more uniform heat by controlling the outlet throughthe herein.

Having thus described this invention, I claim:

1. An oven ventilating flue for gas ranges comprising a pipe having aclosed top and an open bottom, and an intermediate perforated portion, afiltering element disposed vertically substantially midway of the widthof said pipe and having a closed base, and a damper arranged between thebase and the adjacent side of the pipe.

2. An oven ventilating flue for gas ranges, comprising a pipe having aclosed top and an open bottom, an intermediate perforated portion, afiltering element disposed vertically substantially midway of the widthof said pipe, a base between the bottom of said element and one side ofsaid pipe, and a damper between the base and the opposite side of saidpipe.

3. An oven ventilating flue for gas ranges, comprising a pipe open atone end and closed at the other end, and having an intermediateperforated portion, and a filtering element disposed within said pipe soas to divide the same into vertical compartments, and a base for onecompartment.

4. An oven ventilating flue for gas ranges, comprising a pipe open atone end and having a removable closure for the other end, and beingfurther provided with perforations on one side, a flange extendinglaterally to a point substantially midway of the width of the pipe, anda. slidable filtering element disposed vertically between said closureand said flange.

5. An oven ventilating flue for gas ranges, having an open bottom andvertical ways therein, and being further provided with perforations onone side, a support disposed transversely within said pipe, a slidablefiltering element adapted to be sustained in said ways, and a closurefor the opposite end of the pipe.

6. An oven ventilating flue for gas ranges, comprising a pipe having anopen end and a closed end, and an intermediate perforated portion, afiltering partition opposite said perforated portion, a base for saidpartition, and means for controlling the admission of oven gases to saidpartition.

In testimony whereof I affix my signature.

WILLIAM A. E. VALENTINE.

restricting element shown

